http://www.runescape.com/game.ws?m=0&a=2We all know it, we all love it. As it clearly states: "your greatest adventure".

http://signup.leagueoflegends.com/en/signup/redownloadHere's another MMO focused mainly on pvp. Honestly I really don't like this one, but it is really popular so here you go! Well, you have to download it first...